Marine Interpretation Message
Issued by NWS

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AGPN40 KWNM 040906
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
106 AM PST WED MAR 4 2015

.FORECAST DISCUSSION: MAJOR FEATURES/WINDS/SEAS/SIGNIFICANT
.WEATHER FOR THE NORTH PACIFIC N OF 30N AND E OF 150W.

THE IR SAT IMG STILL INDCT ALMOST CLR SKIES WITH NO LIGHTNG OVR
THE REGION. THE RADAR ALSO HAS NO INDC OF TSTMS CELLS OVR THE WTRS
AND EVEN WITHIN ITS VCNTY. AT 0600Z HGH PRES 1029 MB CNTRD NR
40N140W STILL HAS ITS RIDGE OVR THE NRN WTRS WITH ITS SE RIDGE
AXIS PASSING W OF THE SRN WTRS. INLAND TROF STRETCHES ALOMG THE
COAST FROM AZ THRU CA AND INTO THE COAST OF OREG. LOW PRES 1011 MB
SE OF THE ALEUTIAN ISLANDS HAS A FRNT PASSING W OF THE HGH PRES
NOTED ABOVE. UPSTREAM IS ANOTHER HGH PRES 1037 MB OVR CNTRL PAC.
THE PRES GRDNT IS STLL FAIRLY SLACK OVR THE REGION AND THE OBSVD
WINDS RANGE BTWN 10 AND 20 KT. THE LATST R-SCAT PASS AT 0512Z HAD
NO WINDS ABOVE 20 KT ACRS THE REGION.

AN UPPRLVEL RIDGE JUST W OF THE REGION HAS KEPT ALL THE ENRGY E
OF THE WTRS XCPT FOR SOME ENRGY FROM A BACK HANGNG INLAND UPPRLVL
TROF THAT STRTCHES INTO THE FAR SRN WTRS INLINE WITH 20 KT WINDS
AND HGHR SEAS NOTED ABOVE. UPPERLVL RIDGE WILL SHIFT E AND BE OVR
THE REGION THRU THE FCST PRD. AS SUCH A MDL CHOICE SHUD BE ONE
THAT WILL KEEP SHIFTING WINDS MAINLY FROM N TO SW UP TO 20 KT.

THE GLBL MDLS HV CONTNED TO INITIALIZE WELL AND THEY ARE STILL IN
DECENT AGRMNT WITH JUST MNR DIFFS IN THE WIND SPEED WHEN LOW PRES
PASSES TO THE NW. OTHERWISE WILL CONTNE WITH GFS. IN THE SHORT
TERM THE HGH PRES WILL REMAIN ANCHORED TO THE W AND THAT WILL
PREVENT FRNTL SYSMS FROM REACHING THE WTRS. AS HGH PRES SHIFTS
E...A FRNTL SYSTEM WILL ALSO MOVE CLSR TO THE WTRS BUT WILL STILL
BE BLOCKED AND STALL THUS WILL ONLY ALLOW THE LOW PRES TO GLIDE NE
AND DISPT NW OF THE REGION. ANOTHER LOW PRES WILL DVLP ON THE
QSTNRY FRNT BUT THAT WILL BE AT THE END OF THE FCST PRD AND WILL
NOT BE IN THE WTRS. AS SUCH THE PRES GRDNT WILL REMAIN RELAXED
THRU THE FCST PRD AND WINDS WILL NOT REACH GALE FORCE THRESHOLD.

.SEAS...THE SEAS ARE HGHST OVR THE CNTRL AND SRN WTRS PEAKING AT
10 FT WHILE THEY RANGE BTWN 4 AND 6 OVR THE NRN WTRS. THE LTST
JASON PASS AT 0322Z ACTUALLY MISSED THE ENTIRE CNTRL AND SRN
REGION AND INDCTD SEAS RANGING BTWN 4 AND 7 FT OVR THE NRN WTRS.
NWW3 FITS WELL WITH THE OBSVD SEAS PATTERN AND HAS BEEN QUITE
CONSISTTNT WITH THE FCST SEAS. NWW3 IS ALSO CLOSE TO THE ECMWFWAVE
AND SO WILL CONTNE TO STAY CLOSE TO IT.

.EXTRATROPICAL STORM SURGE GUIDANCE...N/A.

.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
     NONE.

.PZ6 CALIFORNIA WATERS...
     NONE.

$$

.FORECASTER MUSONDA. OCEAN PREDICTION CENTER.


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